Unstable Idle, running too rich.

[Quebab]

Hi,

My nubira 2000 SE dont run well. I had it repaired at the local dealer and he installed a new O2 sensor and the IAC. All sensors seems to be ok when he checks with the computer. But still it runs to rich in idle, the injectors get 4ms pulses. At higer RPM?s it works great. When i turn on the AC the engine dies.

I have no clue what so ever and am thankfull for every sugestion.

The exhaust values are also to high.